## page was renamed from MK3838
see also: AntriebsTheorie, [[en/MotorCurves]]

= MK3638 & MK3538 =
<<TableOfContents>>

= Photo  =
[[http://gallery.mikrokopter.de/main.php/v/tech/MK3638_001.jpg.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=80891}}]]

[[http://gallery.mikrokopter.de/main.php/v/tech/MK3538d.jpg.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=67393}}]]
[[http://gallery.mikrokopter.de/main.php/v/tech/MK3538b.jpg.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=67385}}]]


== Version V2 ==
{{https://www.mikrocontroller.com/images/MK36385V2_.JPG}}

{{https://www.mikrocontroller.com/images/3holemount_1.JPG}}

{{https://www.mikrocontroller.com/images/3holemount_2.JPG}}

 * 4 holes for propeller mount
 * for direct propeller mount

= where to buy =
The Motor is custom made for MikroKopter only. You can buy it [[https://www.mikrocontroller.com/index.php?main_page=product_info&cPath=73&products_id=615|here]]


Plate for direct carbon propeller mount [[https://www.mikrocontroller.com/index.php?main_page=product_info&cPath=75&products_id=861|here]]

= Features  =
This motor has long wires (52cm), a short shaft and a small clipring. So it can be mounted directly on the aluminium arm.

[[http://gallery.mikrokopter.de/main.php/v/tech/MK3538e.jpg.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=67397}}]]

= Technical data =

||Voltage Lithium: || 3-6 ||
||Current: ||max 20A||
||Current max. (60 Sek.): ||25 A ||
||RPM/V: || 760 Rpm/V ||
||Wire resistance: || 0,11 Ohm ||
||Phase resistance: || 0,07 Ohm ||
||No-load Current: || 0,65A @ 10V ||
||Num. magnetic poles: || 14 ||
||Propellers: || 10" - 14" ||
||Max. Efficiency (g/W): || 7.36 ||
||Electrical power: || max 350 W ||
||Thrust max.: ||max 2200 g ||
||Weight (only motor) ||  100g ||
||Weight incl. cable and adapter ||  125g ||
||Dimensions: || h=38 d=35 mm ||
||Shaft diameter: ||4 mm ||

= Mounting plan =

[[http://gallery.mikrokopter.de/main.php/v/tech/MK3538.jpg.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=69565}}]]

= Thrust over current =

<<Include(en/MotorCurves, , from="##include_3638_begin", to="##include_3638_end")>>

== Different props ==
[[http://gallery.mikrokopter.de/main.php/v/tech/MK3538_characteristic_curve.gif.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=67405}}]]

Same curve in higher resolution:

[[http://gallery.mikrokopter.de/main.php/v/tech/MK3538_characteristic_curve_0-8A.gif.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=67409}}]]

== APC Propellers ==
[[http://gallery.mikrokopter.de/main.php/v/tech/MK3538_characteristic_curve_APC.gif.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=67417}}]]

=== 13x6,5 APC ===
[[http://gallery.mikrokopter.de/main.php/v/tech/MK3538_characteristic_curve_APC13x6_5.gif.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=67413}}]]

=== EPP-CF (chopped fiber) ===
[[http://gallery.mikrokopter.de/main.php/v/tech/MK3538_characteristic_curve_EPP_CF.gif.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=75006}}]]

= How to read the curves =

With this curves it is easy to estimate the needed current and even estimate the flight-time. 

You can read the needed current for each needed thrust

== Example ==

The total weight of a MikroKopter (4 Rotors) is 1400g -> so each motor needs a thrust of 350g for hovering (1400g / 4 = 350g)

[[http://gallery.mikrokopter.de/main.php/v/tech/MK3538_characteristic_curve_0-8A_howto.GIF.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=67421}}]]

Current needed for 350g with the 13x6,5 APC - Propeller? -> 1,8A

Current needed for 350g with the 12x8 APC - Propeller? -> 2,4A

The total current for all four motors would be 7,2A (4 * 1,8A) or 9,6A (4 * 2,4A)

== Flight time ==
You can estimate the flight time with this formular:

'''Time = 54 * Lipo / Current'''

(54 because we estimate 10% losses -> 60 * 0,9)

In case we would have a 3300 Lipo (3,3Ah), the Flight time for the 13x6,5 would be:

Time = 54 * 3,3 / 7,2 = 24,7 min


The same for the 12x8 Prop:

Time = 54 * 3,3 / 9,6 = 18,5 min

That is a different of 33% in flight time!

See also: FlugZeit

= Rotation direction =
== Clockwise (seen from above) ==
Connection: 
 * A = gray
 * B = blue
 * C = black

== Counter-clockwise (seen from above) ==
Connection: 
 * A = blue
 * B = gray
 * C = black

== difference MK3538 vs. MK3638 ==
The technical data and weight are the same for both types.

[[http://gallery.mikrokopter.de/main.php/v/tech/MK3538a.jpg.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=67381}}]]
[[http://gallery.mikrokopter.de/main.php/v/tech/MK3638.jpg.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=80886}}]]

Compared to the MK3538 the MK3638 has laser engravings and bigger ball bearings. The bigger bearings make the motor more silent.

[[http://gallery.mikrokopter.de/main.php/v/tech/MK3638Compare1.jpg.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=80927}}]]

[[http://gallery.mikrokopter.de/main.php/v/tech/MK3638Compare2.jpg.html|{{http://gallery.mikrokopter.de/main.php?g2_view=core.DownloadItem&g2_itemId=80931}}]]

Also the shrink tube (cable protection) is longer.



<<BR>>
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 . KategorieMotoren
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KategorieMotoren